Demountable body



Dec. 8, 1942. l E, R, BARRET-r 21,304,622

DEMOUHTABLE BODY Filed Feb. 15, 1941 5 Sheets-Sh'eet 1 F46 l //a f, l' I'l n 43" 'HNI Il, ,l l -q A5 A56 a 2o I Il l] l u 43 f f n l fd 60 I, IlI l f/ l' i! Il ff @gr/#fifi :.I f5@ :lf2 -5 f2 j;

f6 d I 7a Il 'r 0 50W lll' fga fg .Il 30 Q5) L' *u 5 l I' l l, (340 kf 7RN EYS.

Dec. 8, 1942.

Y E. R. BARRETT DEMOUNTABLE BODY Filed Feb. l5. 1941 s sheets-sheet 2 rDec- 8, 1942- E. R. BARRETT 2,304,622

DEMOUNTABLE BODY Filed Feb. 15, 1941 s sheets-sheet :s

- INVENTOR Patented Dec. 8, 1942 which is adapted NT OFFICE DEMoUN'rABLEBong Edward R. Barrett, Detroit, Mich., assigner to Gar Wood Industries.Inc., Detroit, Mich., a corporation ot Michigan Application February 15,1941, serian No. 379,005

3 Claims.

type body to be removably mounted on a truck chassis to be transportedthereby.

One of the primary objects of the present inis to provide an aconstruction that the capacity improved demountable` thereof isconsiderably increased over prior bodies of the same type mensions.

Another object a body of the type thereon whereby the dependently of thmay be quickly and easily demounted from the and of comparable overalldi- 101 the invention is to provide mentioned having means body maybesupported ine truck and whereby the body truck or remounted thereon. Afurther object of the invention is to provide hy body independent] ingremoval of the draulically operated means for supporting the y of thetruck and for facilitattruck from under the body.

Other objects of the invention will become apparent from the followingspeciication, the drawings relating thereto, and from the claimshereinafter set forth.

In the drawings, in which like numerals are used to designatethroughout:

like parts in the several views Fig. 1 is a side elevational view of ademountable truck body, s

pendent mounting means;

howing such body on its inde- Fig. 2 is an end elevational view of theconstruction shown in the direction of th one of the hydraulicallyoperated jacks in crosssection;

3 is a view Fig. 1, taken substantially in e arrow 2 of Fig, landshowing similar to Fig. 2, but showing a body mounted on the truckchassis and supported thereby;

Fig. 4 is a diagr circuit and associated ammatic view of the hydrauucoperating elements used with the structure disclosed in Figs. 1 to 3;

Fig. 5 is a view modied form of similar to Fig. 1, illustrating a thebody; and

Fig. 6 is an end elevational view of the structure shown in Fig. 5.

In general, according to the present invention,

a demountable truck body` is provided in which such body is formed oi'ments with downwardly directed central discharge openings formedtherein. Such body is a plurality of compartground are xed to the sidemembers,

'ably mounting the body on the truck chassis, and

further power operated means are provided which include ground engagingarms. Such arms are iirst moved outwardly, so as to clear the truckwheels, and then are moved downwardly into engaging position to raisethe body slightly above the chassis and to provide independent supportsfor the body. 'I'he truck may thereafter be driven from under the body;and when it is desired to haul the body away, the truck merely needs tobe backed up to its initial position and the power' means operated tolower the body and retract the ground engaging wheels so that the bodymay then be connected again to the truck chassis. The hydraulic circuitis such that the ground engaging arms are :drst moved outwardly to clearthe wheels before they are loweredltoward the ground, so that nointerference with the wheels will be present.

For a better understanding -of the invention, reference may be had tothe drawings, and particularly to Figs. 1 through 4 thereof, in whichone embodiment of the invention is illustrated.

A demountable body is generally indicated at I0 which includes sidewalls I2 having upstanding and having downwardly and in- .bottomportions I4. Such bottom portions I4 terminate in depending lower edgeAportions I6, which are substantially vertical and are in spacedrelation to each other to provide discharge openings. The body I0 alsoincludes substantially vertical end wall members I8, which as bywelding.

A plurality of longitudinally spaced, transversely extending, verticalpartitioning members 20 are disposed within the body and vextend betweenthe side Walls I2 and are xed thereto to provide a plurality of separatecompartments within the body. Suclr members 20 are of the same shape asthe end members I 8, having the shape shown in end elevation in Fig. 2

The side walls, the end walls and the partitioning members define thewalls of the separate chambers and provide a separate discharge opening22 for each of such chambers. A gate member 24 is positioned over thelower end of such 26 thereof pivoted to one of the depending sides I4and having the other edge releasably held closed by means of one of thecompartments will drop down into the discharge opening 22 and be heid inposition by the closed gate 24. By then positioning the slide 80 asshown in Fig. 2, a measured quantity of the material will be dischargedfrom the opening 22 when the gate 24 is released. It will be evidentthat if itis desired, the slide 30 may be left out, so that each bin maybe continuously discharged until it is empty.

The bdy I is adapted to be removably mounted on the chassis, generallyindicated at 34, of an automotive truck having conventional ground 86.Such truck chassis has transversely extending members 88 with droppedcentral portions, as shown in Fig. 3, for the reception of the wallsforming the opening 24 which are received within such drop frame members38. Mounting brackets 40 are iixed to the longitudinals of the chassis34,' and have upwardly and outwardly inclined supporting members 42secured thereon which run along the length of the chassis. Such members42 are sloped complementariiy tothe slope of the bottom portions I4 ofthe body, so that such body may rest on and be supported by the members42.

Clamps 44 are mounted on the bottom portions I4 of thel side walls vI2of the body I0, and are adapted to releasably engage the upper outerends of members 42 for releasably connecting the body I0 to the truck.

Means are also provided for supporting the body I0 independently of thetruck and for positioning it so that the truck may be readily and easilymoved from under the body. Such means include longitudinally extendingshaft members 45, disposed at each side of the body along the upper edgethereof and mounted to the body by means of brackets 48.

Depending struts 50 are provided at each corner of the body and havetheir upper ends pivotally connected to the shafts 45. Ihe lower ends ofsuch members 50 are formed with hub portions 52, which pivotally receivetherethrough a longitudinally extending shaft 54 at each side of thebody. 'I'he shafts 54 project through the hubs 50, and the projectingends of one of the members 54 pass through a pivot aperture provided ina transversely extending cylindrical strut 55; and the other member 54passes through a pivot opening in another transversely extendingcylindrical strut 58. The strut 55 has an hydraulic cylinder 58 rigidlyconnected thereto; and the strut 58 provides the piston rod of anintegral piston 52 which is slidably received within the cylinder 60.Such cylinder 60 has the usual cap 64 through which the piston rod orstrut 58 is slidably received and is provided with the usual packing 66therein. Such packing 56 further locates the stroke of the piston 58 inone direction. It is to be understood that there is one of suchcylinders and pistons provided at each end of the body.

Dependingy ground engaging arm members are provided at each corner ofthe body and are formedby upstanding members 58 and 10, having a groundengaging wheel 12 pivotally connected thereto adjacent the lower endsthereof. The upper ends of members 58 and 10 have hub portions 14I and16, respectively, which straddle the shafts 54 and pivotally receivetherethrough the cylindrical strut 55 at one side of the body, and thepiston rod 58 at the other side of the body.

CFI

It will thus be seen that the ground engaging arms are pivoted withrespect to the members 58 and An hydraulic jack is provided for movingeach of the ground engaging arms 58, and such jack includes the usualhydraulic cylinder 18 having a piston rod projecting from one endthereof. The base end of each of the cylinders 18 is pivotally mountedto a mounting bracket 82 which, in turn, is mounted on shaft 54. Thebrackets 82 are fixed with respect to such shaft so that the base endsof the cylinders are xed and the base ends of the jacks on one side ofthe body may be connected by a compression strut 84. The outer ends ofthe piston rods 80 extend between the members 68 and 10 of the groundengaging arms, and are pivotally connected thereto by means of a pivotpin 85.

It will thus be seen that when the cylinders 60 and piston rods 58 areextended with respect to each other, the ground engaging arms are flrstmoved outwardly away from the body as the arms 50, together with theshafts 54, swing out from the position shown in Fig. 3 to the positionshown in Fig. 2. The pistons 80 are then extended so that the groundengaging arms are swung downwardly from the position shown in brokenlines to the position shown in full lines in Fig. l.

The power means for operating the cylinders and for moving the arms areshown in Fig. 4, and comprise a tank or reservoir 88 adapted to containthe operating fluid, preferably oil. Such tank 88 has a supply conduit90 communicating with the interior thereof which is adapted tocommunicate with the inlet of a conventional hydraulic pump 92. Theoutlet of the pump 92 communicates with an outlet conduit 94 connectedto the inlet of a conventional four-way valve 95. One of the outlets ofthe four-way valve 96 communicates with a supply conduit 98, having aconventional shut-off valve 99 interposed therein, which communicateswith an inlet or supply conduit |0I, the conduit also having a shut-offvalve |02 interposed therein. The conduits 98 and |0| may be removablyconnected together by means of a suitable coupling |04.

A by-pass conduit |06 communicates with one of the other ports of thefour-way valve 96, and returns to the tank through a conventionalpressure relief valve |08 and through a conduit |I0. Another returnconduit II2 communicates with one of the other ports of the four-wayvalve 96 and returns directly to the tank. Another return conduit I I6,having a conventional shut-ofi valve IIB interposed therein, isconnected to a return conduit II8, also having a conventional shut-olfvalve |20 interposed therein, by means of a suitable coupling |22.

The tank 88, pump 92, valve 96 and conduits 90, 94, 98, |06, IIO, II2,and II4 are mounted on the truck in a manner similar to the mounting ofsimilar elements in the dump body hydraulic hoist art. The pump 92 isdriven by means of a suitable power take-off from the enginetransmission, as is usual in the hydraulic hoist art. The conduits |0|and I I8 are mounted on the body I0; and the conduit IOI communicateswith an inlet port |24 of the cylinder 60. Such port |24 is 1ocatedadjacent the vbase end of the cylinder, and an outlet port |26 isprovided in the cylinder wall located at a predetermined distancebetween the base and cap ends of the cylinder. A conduit |28communicates with the port |26 and includes branch conduits |30, whichcommunicate with the cylinders 18 adjacent the base ends thereof foradmitting fluid to such cylinders for extending v72 engage the ground.

the piston foes so. ouder ports se are disposed in the opposite ends ofthe cylinders 18 and'communicate with return conduits |36, all of whichcommunicate with return line i8.

With the body mounted on the truck, as shown in Fig. 3, and with theconduits 98 and |0| and conduits H6 and H3 connected and the shut-onvalves open, the valve 96 is positioned to admit iluid under pressureinto conduit mi Such conduit admits the fluid under pressure into thecylinder 60 to first extend the members 56 and 5t in order to swing theground engaging arms outwardly to the lateral position shown in Fig. 2.The port 26 is so positioned that it is not uncovered until the piston62 has passed'thereby, to the Position shown in Fig. 4. and so that themembers 56 and 58 are extended a predetermined distance before the iluidunder pressure passes into conduit |28. When the port |28 is uncovered,such uid under pressure passes into conduit |28 and into conduits |30 toextend the piston rods 89. This drives the ground engaging armsdownwardly from the position shown in broken lines to that shown in fulllines, in Fig. 1, so that the Wheels The ground engaging arms are ofsuch a length with respect to the height of the chassis, that the bodyis raised above the chassis a slight amount. It will, of course, beunderstood that the clamps dfi have lrst been released.

With the body i0 slightly raised above the;

chassis and with the wheels 'it engaging the ground, the body I0 issupported on the ground independently of the truck. The shut-on' valves$9, |62, H and |20 may then be shut oi and the couplings iiil and |22disconnected, so that the truck may be driven out from under the body.The body u may be left to stand in such position and the wheelbarrow,such as that shown in broken lines in Fig. 2, or similar transportingmeans, may be positioned under the body ior receiving the materials asthey are discharged therefrom.

When it is desired to remount the body i@ on the chassis, it is merelynecessary to bacia the chassis into its initial position under the bodyand connect couplings its and 22 again, and open the shut-od valves andfour-way valve Q6 so that the tluid under pressure passes throughconduits |05, H8 and |34 to cylinders i5 to move the pistons 30 in theopposite direction. This will `swing the ground engaging arms back upinto their initial position, and such arms may be pushed inwardly tocollapse the struts and at. A. transversely extending spiral spring i3dmay be connected to the members 50 for assisting in pulling such memberstion against the sides of the body. The clamps 44 may be repositioned toclamp against 'membersd and thus secure the body i@ onto the chassis.

In Figs. 5 and 6, a modified form of the present invention isillustratedin which the ground engaging members move vertically, ratherthan swing downwardly, as in the embodiment described above.

The means for supporting the ground engaging wheels and the hydrauliccircuit, including the hydraulic jacks, are substantially the same asthat in the embodiment described above, and

back into their initial posisimilar reference numerals have been used inFigs.

5 and 6.

The ground engaging arms include depending members id having groundengaging enlargements M2 secured to the bottom ends thereof. 75

' the ground engaging 3 Such members MU are slidably received withinbearing collars |44 and |46 mounted on an up standing frame member M8.The members |68 at the corners of the body are xedly mounted to themembers 56 or 58. Another depending frame member |50 is spaced inwardlyfrom each of the members |48 and is also fixed to the members 56 or 50.A pivot shaft |52 and a spacer sleeve 55 are disposed between members|48 and i50 adjacent the top thereof, and provide a pivot mounting forthe base end of one of the hydraulic cylinders 1t. 'Ihe piston rod 80 oieach of the cylinders 18 projects downwardly and is pivotally connectedby means of a pivot pin |56 with crank arms |58 and |60. 'I'he crankarms |50 have their inner ends pivotally connected to the members 56 or58 so that the pivotpin |56 is limited to move in an arc with the arms|58 as the radius. 'I'he lower end of each of the members |60 ispivotally connected to the ground engaging member by means of a pivotpin |62.

It will thus be seen that with the admission of fluid under pressure tothe cylinder 60, the members 56 and 58 are first extended to movemembers |48 together with the supporting framework and hydrauliccylinder 78 and piston rod 80 outwardly, away from the body, to clearthe ground wheels of the truck. Thereafter, the hydraulic jacks 'i8 areoperated to move the crank arms i5@ and it@ from vthe position shown inbroken lines in Fig. 5 to that shown in full lines, so that the membersm0 are moved downwardly into engagement with the ground. The travel ofsuch arms iii@ is such that the body i0 is raised slightly above thechassis so that the truck may be removed therefrom, as in the embodimentdescribed above.

Formal changes may be made in the speciiic embodiment ci the inventiondescribed without departing from the spirit and substance of theinvention, the scope of which is commensurate with the appended claims.

What is claimed is:

l. In combination, a truck including a chassis, a body adapted to bemounted thereon, means demountably connecting said body to said chassis,and hydraulically actuated means mounted on said body for supportingsaid body when disjacks operatively connected with said members to movesaid members outwardly of nected to said body and to said members formoving said members toward the ground.

2. In combination, a truck including a chassis, a body adapted to bemounted thereon, means demountably connecting said body tc said chassis,and hydraulically actuated means mounted on said body for supportingsaid body when disconnected from said chassis, said last named meansincluding movable ground engaging members, hydraulic jacks operativelyconnected with said members to move said members outwardly oi saidchassis, hydraulic jacks operatively connected to said body and to saidmembers for moving said members toward the ground, means providing anhydraulic circuit between said rstnamed jacks and said second namedjacks so constructed that said members are first moved outwardly andthen downwardly.

3. In combination, a truck including a chassis, a body adapted to bemounted thereon, means demountably connecting said body to saidchasdraulically responsive element for moving said members downwardly,and means hydraulically connecting` said hydraulically responsiveelements in a series so that said members are ilrst moved outwardly andthen downwardly.

EDWARD R. BARRETT.

